I also see some other differences with the one-spikers you show; the horn/ivory/animal part of the guard is not the same shape; it is rectangular from a side view, while on the 3 spike ones it narrows to form a short part of the handle.  Also, the arrangement of the spacers is different, and seems consistantly different.  Any of this may be consistant with a military rank marker, as suggested, especially when taken with the ivory.  Do African water buffaloes have pale/green horns?  Aren't Somalis cattle-keepers?
		 
		
		
		
		
		
		
		
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